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from ctypes import cdll, c_int, Structure, byref, pointer, POINTER, c_int, c_char_p
class tm(Structure):
_fields_ = [("tm_sec", c_int),
("tm_min", c_int),
("tm_hour", c_int),
("tm_mday", c_int),
("tm_mon", c_int),
("tm_year", c_int),
("tm_wday", c_int),
("tm_yday", c_int),
("tm_isdst", c_int)]
def dump(self, indent=""):
INDENT = " "
print "%s%s:" % (indent, self.__class__.__name__)
for name, fmt in self._fields_:
val = getattr(self, name)
if isinstance(val, Structure):
val.dump(indent + INDENT)
elif isinstance(val, long) or isinstance(val, int):
print "%s%30s: %s (0x%x)" % (indent, name, val, val)
else:
print "%s%30s: %r" % (indent, name, val)
print
import os, sys
if os.name == "nt":
clib = cdll.msvcrt
elif os.name == "posix":
if sys.platform == "darwin":
clib = cdll.LoadLibrary("/usr/lib/libc.dylib")
elif sys.platform == "cygwin":
clib = cdll.LoadLibrary("/bin/cygwin1.dll")
else:
clib = cdll.LoadLibrary("/lib/libc.so.6")
def test_time():
# Assigning argtypes to a function retrieves the 'from_param' attribute
# from every type and store it. When the function is called, the attribute
# is called with each actual parameter, and the result is pushed on the stack.
# Retrieving the argtypes value again returns a tuple of these from_param attributes,
# so
# func.argtypes = (c_int,); y = func.argtypes
# will set y to (c_int.from_param,).
if clib.localtime.argtypes:
print "Testing with function prototypes"
print "================================"
else:
print "Testing without function prototypes"
print "==================================="
clib.localtime.restype = POINTER(tm)
ltime = c_int()
result = clib.time(byref(ltime))
print ltime.value, result
import time
print time.time()
pnow = clib.localtime(byref(ltime))
pnow.contents.dump()
t = clib.asctime(pnow)
print repr(t)
if __name__ == '__main__':
test_time()
# prototype
clib.asctime.argtypes = [POINTER(tm)]
clib.asctime.restype = c_char_p# "z"
# prototype
clib.time.argtypes = [POINTER(c_int)]
clib.time.restype = c_int #"i"
# prototype
clib.localtime.argtypes = [POINTER(c_int)]
test_time()
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